[CS-FSLUG] What if DNS goes down?

Sophie Hamilton cs-fslug at theblob.org
Fri Sep 18 14:58:16 CDT 2009

On 9/18/09, Sophie Hamilton <cs-fslug at theblob.org> wrote:
> The 13 root DNS servers are spread out all over the world, not based
>  in one country. As long as one root DNS server exists, DNS queries can
>  still theoretically work, although that one DNS server would be under
>  enormous strain.

Oh, and as it turns out, 7 of these 13 servers are anycasted (
http://en.wikipedia.org/wiki/Anycast#Use_in_DNS ) - so actually there
are more like 123 root servers, but just 13 IPs. So it's horrendously
unlikely that all of them would go down. (if it was only 0.000001%
likely before, it'd now be 0.00000000000000000000000000000000000001%
or something stupid like that ;p)

 - Sophie.

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